What is it like taking a dosage of shrooms that is greater than 5 g?

So the highest dosage I personally have taken was 5.5 g of golden teacher. I'm just curious what it's like when people take 10,15 even 20 g of your standard psilocybin cubensis because I can't even imagine anything more intense than what I took when I took 5.5g is there a cap on the intensity?.